Which sword
The Silver Sword of the Astral Plane is the legendary +3 greatsword tied to Kith'rak Voss. Voss' Silver Sword is a different, weaker blade. This page is the Act 1 Mountain Pass disarm.
A githyanki wielder gains Githborn Psionic Resistance: advantage on Intelligence, Wisdom, and Charisma saving throws, psychic resistance, and immunity to being Charmed, plus the eighteen conditions in the Charmed status group.
Githborn Psionic Weapon adds 1d6 Psychic damage when a githyanki holds the sword.
bg3.wiki · Silver Sword of the Astral Plane (read 2026-11-01)
Act 1 timing on the Mountain Pass
Voss stands on the Mountain Pass approach before the Rosymorn road. Disarm him before the patrol conversation starts. Any hostile action from the party or its allies makes him fly. Walking in close locks dialogue.
Published map mark for the disarm window: X: -139 Y: 561 on the item notes.
bg3.wiki · Silver Sword of the Astral Plane (read 2026-11-01)
Leave Lae'zel at camp for this steal. The early-sword guide records that she turns hostile if she is in the active party when you take the blade.
If the legendary sword is taken here, the Act 3 quest does not hand over a second copy.
bg3.wiki · Silver Sword of the Astral Plane (read 2026-11-01)
Disarm methods that work here
The item notes list Command (Drop), Heat Metal, Fear, Disarming Attack (Ranged), Honeyed Paws, and Dirty Trick: Flick o' the Wrist. His saves and armour class are high, so expect reloads or prep.
Honeyed Paws on a Beast Master Ursa Major is the cleanest line: a hit auto-disarms with no save. A Divination Portent die of 15 or higher nearby can lock the attack; long rest until that die shows, turn the bear invisible, then close.
Command Drop fights his Wisdom save with advantage. Heightened Spell on a Sorcerer multiclass is the prep the early-sword guide uses to cancel that advantage.
Heat Metal targets Constitution, where he does not get advantage. Fear can also strip the weapon when it is available.
Disarming Attack must hit first, then beat a Strength save. The early-sword guide notes Lethargic after a Potion of Speed expires as a way to force that Strength fail.
Crossbow spawns and despawns
Later patches often put a Githyanki Crossbow in his hands instead of the sword. Sometimes a dropped sword phases out. Triggers for both are not published.
When he spawns with the crossbow, the early-sword guide uses an Iron Flask Spectator thrown near him so he draws the silver sword in melee, then you disarm that weapon before he leaves.
Act 3 if you skip Act 1
If you never take the blade here, Act 3 still pays it out through Help Kith'rak Voss after you can show the Orphic Hammer, or through the Deal with the Devil lie.
Refuse Raphael, then successfully lie to Voss before the Lower City, and the item notes list a DC 30 Deception check for the sword.
bg3.wiki · Silver Sword of the Astral Plane (read 2026-11-01)
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